基于超级电容与链式逆变器的电网暂态支撑  

Power Grid Transient Support Based on Supercapacitor and Chained Grid-connected Inverter

作　　者：邓刚 陶智 万兵 DENG Gang;TAO Zhi;WAN Bing(State Grid Luzhou Electric Power Supply Company,Luzhou 646000,China)

机构地区：[1]国网泸州供电公司,四川泸州646000

出　　处：《电力电子技术》2023年第3期95-98,共4页Power Electronics

摘　　要：高比例新能源接入电力系统带来电网频率电压失稳风险,其中在受端电网侧高压直流落地区直流闭锁将引起大功率缺失,同时伴随着近区电压大幅度波动。就地新能源快速有功功率支撑可有效降低频率越限风险,同时毫秒级无功功率支撑可以平抑近区电压波动。为此提出基于超级电容器储能与链式并网逆变器的暂态频率电压支撑控制技术及其装置,利用超级电容器功率快速充放的特点,并通过链式并网逆变器实现了毫秒级有功功率、无功功率调节,提高了稳定系统调节裕度,丰富了电网三道防线的调节手段。所提技术及开发的装置通过接入110 kV变电站中进行了现场验证,表明了基于超级电容器与链式并网逆变器对于电网频率电压暂态支撑的有效性。The high proportion of new energy connected to the power system brings the risk of grid frequency and voltage instability,in which the DC latching in the high-voltage DC area of the receiving side of the grid will cause the loss of high power,accompanied by large voltage fluctuation in the near area.The local new energy fast active power support can effectively reduce the frequency over limit risk,and the millisecond reactive power support can stabilize the voltage fluctuation in the near area.Therefore,a transient frequency voltage support control technique and its device based on supercapacitor energy storage and chain grid-connected inverter is proposed,the characteristics of supercapacitor flled with power,and the chain grid-connected inverter is used to realize a millsecond active power,reactive power regulation and improves the stability of system to adjust margin,enrich the power geid of three lines of defence adjustment means.The proposed technology and the developed device are verified in a 110 kV substation,which shows the effectiveness of the grid frequency and voltage transient support based on supercapacitor and the chain grid-connected inverter.

关 键 词：逆变器 超级电容 电压支撑控制 电压暂态支撑 

分 类 号：TM464[电气工程—电器]